Tasteless quinin compound and process of making same.



. To all wh'om 'it may concern: I

Be it known that I, LORENZ A011, a citizen PATENT mm.

LORENZ ACE, OF MENNHEIM-WALbHOF, GERMANY, ASSIGNOB TO 0. IBOIEIEIIRIIIG-ER & SOEENE, 'OF MANNHEIM-WALDHOF, GERMANY, A FIRM.

" a'As'rELEss comm courouxm Ann PROCESS or Maxine SAME;

We Drawing.

7 ,of the German Empire, residing at Mannheim-Waldhof, Germany, have invented certain new and useful Improvements in Tasteless Quin-in Compounds and Processes of Making Same; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains tomake and use the same.

Compounds of quinin which do not possess the strongly bitter-taste of this alkaloid have frequently been prepared; among.

others also esters of quinin. The esters hitherto prepared however possess the disadv ntage that the quinin contained in them does not come into full action inthe organism and that consequently it is'necessary to administer relatively large doses in order to obtain a sufficient therapeutic efiect.

'1 My invention consists in preparing a new compound of quinin,- which 1s absolutely tasteless, but being readily split up exercises the full action ofquinin in the organism.

The preparation of this new quinin compound is carried out by esterifying quinin with diglycollic acid according to one of the well-known methods used in similar processes of esterification. These compoiinds all have the formula 41 4 3 20 23 2 2) 2' V Example 1: 11 parts by weight of quinin are dissolved in the smallest possible amount of chloroform and-subjected to the action of 3 parts by weight of diglycollic acid chlorid for 2-3 days in the absence of air, the mixv ture being cooled. The hydrochloric acid salt brought into solution by agitating with a' 1% solution of hydrochlonc acid at -0 6.5 This solution is then covered with a considerable layer of ether and the ester salt of the ester is thereby formed which precipitated carefully with aqueous ammonia. solution, the ester going mto solution in i the ether. The 'ethersolution is then treated with a small amount of hydrochloric acid (about,5-1-10% of the amount'which is necessary to neutralize the originally used amount ofquinin). which removes unaltered quinin.

There "remains a spongy mass melting at about 70 C. which onanalysis'exhibits the- Patented July 16,1912.

constitution of diglycolli-c acid quinin ester. The substance Is an absolutely tasteless, V0-

luminous white powder, sparingly soluble in water, very readily soluble in ether, benzene,

chloroform, less soluble in ligroin.

Example 2: 10 parts by weight of quinin are dissolved in 55 parts by Volume of di-- chlorethylene, the solutionis cooled to 0 C. and 1.4 partsby weight of diglycollicchlorid dissolved in 15 parts by volume of-dichlorethylene are gradually poured in, the-whole being well stirred. The temperature of the mixture is'kept during'the process between 10 and 15 C. The liquidis then repeat edly shaken with 200 parts bf water, which takes up the unaltered quinin in the form of its hydrochloric acid salt. The dichlorethyL' -ene solution is then stirred together with 200 parts of 1% sulfuric acid, the ester en-- tering the aqueous solution as sulfate. To this aqueous solution 6 partsof sodium-acetatein 40 parts of wa erare added, whereupon the sulfate of di%lycollic quinin ester separates the crysta' line state. the air'it possesses the formula e-aawammm.).-

and'is absolutely tasteless. It is very sparingly soluble in water and organic solvents.

Example 3: (LE-parts by weight of quinin are heated with 3 parts by weight of diglycollicphenylester, described in U. 8. Patent I Dried in N0.-948084; in a vacuum for 1 hours to a temperature of 120 C. whereby phenol distils off. The residue is dissolved in chloroform and freed from unaltered quinin by shaking with small quantities of dilute acetic acid. The chlorofbrm solution is then dried and evaporated. Diglycollic acid'quinin ester remains. i j 3 Example 4:; 0.6'parts of magnesium are treated according to Grignards method with To this solution 8 parts of quinin dissolved "3 parts of ethyl bromid in ethereal solution.

in chloroform are added, the whole. being well stirred and cooled. After all has been added, the mixture is slightly heated. It is then again-pcooled and 3 parts ofdiglycollic chlorid added and the whole heated slightly and finally boiled for an hour. The excess of quinin is extracted from the organic solvent by agitating it with small quantities of 1% sulfuric acid solution; the ether chlorov I What I claim and desire form solution is dried and evaporated to dryness in a vacuum; Diglycollic acid quinin ester remains as residue.

to secure by Letters Patent, is:

1. The preparation of tasteless quinin compounds which consists in subjecting q uinin, together with a compound containing the diglycolh'c acid radical to a process of esterification. 1 I 2. In the preparation of tasteless quinin I compounds, the process which consists in' reacting on quinm with a compound containing the diglycollicacid radical.

3. The preparation of tasteless quinin compounds of quinin and (liglycollic acid by reacting with diglycollic chlorid on qui- 4. Thecompounds of quinin and diglycollic acid by dissolving quinin in a 'suita le organic sol- -ventand adding diglycollic chlorid.

5. The preparation of tasteless I compounds of quinin and di lycollic acid by dissolvin quinm in a suita 1e. organic solvent, addmg diglycollic chlorid, cooling and agitating the mixture.

6. The 7 preparation of tasteless quinin compounds of quinin and diglycollic acid by I dissolving quinin. in a suita leorganic solvent, adding diglycollic 'chlorid, cooling and agitating the mixture, and at the conclusion 0 the reaction, isolating thenew ester as 1 base according to known methods.

preparation of tasteless quininf 7. The preparation of tasteless quinin compounds of q uini'n and diglycollic acid by dissolving quinm in a suitable organic solvent, adding diglycollic chlorid, cooling and agitating the mixture, and atthe conclusion of the reaction, isolating the new ester in the form of a salt according to known methods/ f 8. In the art of preparing tasteless quinin compounds, the process which consists in reacting on quinin with a compound containing the diglycollic acid radical, and then acting onthe resultant ester with an acid.

9. As a new composition of matter, a compound in which diglycollic acid is combined.

with quinin andv which hasthe general forwhich is a tasteless, colorless crystalline pow- 'der, "very sparely soluble in water and organic solvents.

In testimony whereof- I hereunto aifix my signature inthepresence of two witnesses. I 1; LORENZ ACH.

Witnesses: 'Enunsr L. IvEs,

W. SCHMIDT. 

